Eligible subjects will be randomized at Week 0 (Study Day 1) to either LYC-30937-EC 25 mg or placebo. Screening will occur from Study Days -28 to -1. Randomization and first dosing will occur at Week 0/Study Day 1. Double-blind study visits will occur at Weeks 2, 4, and 8, with the last dose at Week 8/Study Day 57. Subjects will return at Week 10 for a post-treatment safety follow-up visit.